效果图：

用el-carousel 的轮播组件 将样式修改
添加change事件 区分左右点击
获取当前年 和 当前月

        <el-carousel
          trigger="click"
          height="36px"
          :autoplay="false"
          arrow="always"
          @change="carouselChange"
        >
         <el-carousel-item v-for="(item, index) in 99" :key="index">
            <div class="date-box">
              <div
                :class="['date-card', i == dateAct ? 'date-active' : '']"
                v-for="i in 12"
                :key="i"
                @click="clcikMonth(i)"
              >
                {{ dataYear }}-{{ i }}
              </div>
            </div>
          </el-carousel-item>
        </el-carousel>
        <div class="date-result">
          <span>{{ dataYear }}-{{ dateAct }}</span>
          <span>消费成本：<i>628.736.91元</i></span>
          <span>应收账款：<i>976.381.30元</i></span>
        </div>

<script>
export default {
  name: "cusBill",
  components: {},
  data() {
    return {
      dataYear: new Date().getFullYear(),
      dateAct: new Date().getMonth() + 1,//月份是从0月开始获取的，所以要+1;
    }
    methods:{
    clcikMonth(val) {
      this.dateMonth = val;
    },
    carouselChange(key1, key2) {
    // chang事件两个参数，区分向左点击还是向右点击
      //console.log(key1, key2);
      if (key1 > key2) {
        this.dataYear++;
      } else {
        this.dataYear--;
      }
    },
}
</script>

<style lang="scss" scoped>
::v-deep .el-carousel__indicators {
  display: none;
}
::v-deep .el-carousel__arrow--left {
  left: 0px;
}
::v-deep .el-carousel__arrow--right {
  right: 0;
}
::v-deep .el-carousel__arrow {
  border-radius: 0;
  background: #fff;
  border: 1px solid #f3f3f3;
  color: #949494;
}
.date-box {
  padding: 0 40px;
  display: flex;
  flex-direction: row;
  .date-card {
    cursor: pointer;
    background: #f3f3f3;
    width: 90px;
    padding: 10px 0;
    text-align: center;
    border-radius: 4px 4px 0 0;
    font-size: 14px;
    margin-right: 12px;
    &:last-child {
      margin-right: 0;
    }
  }
  .date-active {
    background: #fff;
    color: #2194eb;
    border: 1px solid #f3f3f3;
    border-bottom: 0;
    position: relative;
    &::after {
      content: "";
      display: block;
      width: 90px;
      position: absolute;
      bottom: 1px;
      background: #fff;
      height: 1px;
      z-index: 6;
    }
  }
}
.date-result {
  border: 1px solid #f3f3f3;
  padding: 12px 0;
  span {
    padding: 0 20px;
    &:nth-child(-n + 2) {
      &::after {
        content: "|";
        margin-left: 20px;
        margin-right: -20px;
        color: #f0f7f9;
      }
    }
    i {
      color: #399e0a;
      font-weight: bold;
    }
  }
}
</style>